Yes, like all systems, it has tradeoffs. Although I would argue that some of the downsides you highlight are worse with traditional bus systems (e.g. the Caribbean bus conductors will happily guide tourists, and I have seen them go off-route frequently to drop off someone with limited mobility. Large cities in other parts of the world have managed to scale the system out to fill in gaps with other forms of transit like Lima, Peru)

The GP was arguing that it NEVER works out, and I'm just pointing out that it does work in many places.

I would much rather rely on the Caribbean minibus systems than try to rely on transit in cities like Phoenix.